This is a simple LED-wristwatch with 16 LEDs and one push button. Everything is controlled by a STM32F103 and its realtime clock. Time is visualized using 12 LEDs for the hours and 5 minute steps and 4 additional LEDs to indicate minute%5 . The current hour LED will light up steady while the minute LEDs flash slowly.
- handles 1S LIPO
- 38mm diameter
- 4 Layer PCB
- exposed I2C and UART interface for future extensions